[gmime] Fixed g_mime_header_iter_last() logic

[Jeffrey Stedfast <fejj src gnome org>]

commit aef2af68f15b14967f42ab8363e7a49a5e742fba
Author: Jeffrey Stedfast <fejj gnome org>
Date:   Mon Nov 26 21:05:12 2012 -0500

    Fixed g_mime_header_iter_last() logic
    
    2012-11-26  Jeffrey Stedfast  <fejj gnome org>
    
    	* gmime/gmime-header.c (g_mime_header_iter_first): Make sure the
    	list isn't empty.
    	(g_mime_header_iter_last): Same.

 ChangeLog            |    8 +++++++-
 gmime/gmime-header.c |    8 ++------
 2 files changed, 9 insertions(+), 7 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 7715048..3425c12 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,10 @@
-2012-11-23  Jeffrey Stedfast  <jeff xamarin com>
+2012-11-26  Jeffrey Stedfast  <fejj gnome org>
+
+	* gmime/gmime-header.c (g_mime_header_iter_first): Make sure the
+	list isn't empty.
+	(g_mime_header_iter_last): Same.
+
+2012-11-23  Jeffrey Stedfast  <fejj gnome org>
 
 	* gmime/gmime-header.c (g_mime_header_list_prepend): Prepend the
 	header to the list, don't *append* it. Oops.
diff --git a/gmime/gmime-header.c b/gmime/gmime-header.c
index 96c2f51..030c154 100644
--- a/gmime/gmime-header.c
+++ b/gmime/gmime-header.c
@@ -264,12 +264,10 @@ g_mime_header_iter_first (GMimeHeaderIter *iter)
 	g_return_val_if_fail (iter != NULL, FALSE);
 	
 	/* make sure we can actually do as requested */
-	if (!iter->hdrlist)
+	if (!iter->hdrlist || list_is_empty (&iter->hdrlist->list))
 		return FALSE;
 	
 	first = (GMimeHeader *) iter->hdrlist->list.head;
-	if (!first->next)
-		return FALSE;
 	
 	iter->version = iter->hdrlist->version;
 	iter->cursor = first;
@@ -294,12 +292,10 @@ g_mime_header_iter_last (GMimeHeaderIter *iter)
 	g_return_val_if_fail (iter != NULL, FALSE);
 	
 	/* make sure we can actually do as requested */
-	if (!iter->hdrlist)
+	if (!iter->hdrlist || list_is_empty (&iter->hdrlist->list))
 		return FALSE;
 	
 	last = (GMimeHeader *) iter->hdrlist->list.tailpred;
-	if (!last->next)
-		return FALSE;
 	
 	iter->version = iter->hdrlist->version;
 	iter->cursor = last;